Unplugging brine-submerged perforations in a well

Details Unplugging brine-submerged perforations in a well Unplugging brine-submerged perforations in a well

E - Fixed Constructions

21

B

166/54

E21B 37/00 (2006.01) C09K 8/528 (2006.01) E21B 36/00 (2006.01) E21B 37/08 (2006.01) E21B 43/25 (2006.01)

Patent

CA 1182392

A B S T R A C T UNPLUGGING BRINE-SUBMERGED PERFORATIONS IN A WELL Fluid passageways between a well borehole and a sub- terranean reservoir which are both plugged and submerged within relatively dense brine can be contacted with heat and oil solvent by arranging a nitrogen gas generating aqueous solution to be both reactive at the reservoir temperature and denser than the brine in the borehole and flowing alternating slugs of it and a liquid oil solvent into the zone to be treated.

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